Abstract
The paper presents a damage identification methodology utilizing a model order reduction and a two-stage approach for truss structures. For that aim, a second-order Neumann series expansion is employed to condense structural physical characteristics owing to the limitation of a number of degrees of freedom (DOFs) measured by sensors. In the first step of the two-stage method, the location of potentially damaged candidates is determined via a modal strain energy based index (MSEBI), whilst the remaining one aims to accurately calculate the real damage extent via an inverse optimization problem. A recently developed adaptive hybrid evolutionary firefly algorithm (AHEFA) is utilized as an optimizer to resolve such optimization problems. A 31-bar truss is tested to verify the accuracy of the proposed paradigm.
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